🧪 Goal: Turn an LED on and off using a simple push button.

✅ Components:

LED

220Ω resistor

Push button

10kΩ resistor (for pull-down)

Battery

Breadboard

🧰 Wiring:

1. Connect the push button between the positive rail and a node leading to the LED.
2. Connect the 10kΩ resistor between the other leg of the button and ground (this is the pull-down resistor).
3. Connect the 220Ω resistor to the LED’s negative leg, then to ground.

💡 Why the Pull-down?
When the button isn’t pressed, without a pull-down resistor, the signal line “floats” and might behave erratically. The resistor ensures a stable LOW signal.

🔁 Press the button = LED turns on
Release the button = LED turns off

#CircuitsNerd